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OpenAPI Specification

openapi: 3.2.0
info:
  title: Fast GST Refund preparation Checklist API
  version: 1.3.1
  description: Public preparation guidance, and creation of the Statement 3 and Annexure B JSON files for a GST export refund application. Checking records is open to everyone. A file needs a signed-in account that has paid for the claim. No source-system retrieval, eligibility decision or government submission.
  contact:
    email: support@fastgstrefund.com
    url: https://fastgstrefund.com/for-agents/
servers:
- url: https://fastgstrefund.com
tags:
- name: Checklist
paths:
  /api/checklist:
    get:
      operationId: getRefundPreparationChecklist
      summary: Get records and checks for a refund stage and topic
      description: 'Provide exactly one stage and one need, and no additional query parameters. Does not read or write customer data. Returns JSON with public guide paths. Limit: 60 requests per minute per IP; respect Retry-After on 429.'
      security: []
      parameters:
      - name: stage
        in: query
        required: true
        description: 'preparing: I’m preparing a refund application; upload: My statement or upload needs fixing; filed: I’ve filed and need to follow up; notice: I received a notice or deficiency memo'
        schema:
          type: string
          enum:
          - preparing
          - upload
          - filed
          - notice
      - name: need
        in: query
        required: true
        description: 'eligibility: Understand what I can claim; statement3: Prepare Statement 3; annexureb: Prepare Annexure B; reconciliation: Match returns, invoices and credits; portal: Know what to enter on the GST portal; fullpack: Prepare the whole refund application'
        schema:
          type: string
          enum:
          - eligibility
          - statement3
          - annexureb
          - reconciliation
          - portal
          - fullpack
      responses:
        '200':
          description: Preparation checklist
          content:
            application/json:
              schema:
                type: object
                additionalProperties: false
                required:
                - stage
                - stageLabel
                - need
                - needLabel
                - title
                - summary
                - records
                - checks
                - nextStep
                - guides
                - scope
                properties:
                  stage:
                    type: string
                    enum:
                    - preparing
                    - upload
                    - filed
                    - notice
                  stageLabel:
                    type: string
                  need:
                    type: string
                    enum:
                    - eligibility
                    - statement3
                    - annexureb
                    - reconciliation
                    - portal
                    - fullpack
                  needLabel:
                    type: string
                  title:
                    type: string
                  summary:
                    type: string
                  nextStep:
                    type: string
                  scope:
                    type: string
                  checks:
                    type: array
                    items:
                      type: string
                  records:
                    type: array
                    items:
                      type: object
                      additionalProperties: false
                      required:
                      - name
                      - reason
                      properties:
                        name:
                          type: string
                        reason:
                          type: string
                  guides:
                    type: array
                    items:
                      type: object
                      additionalProperties: false
                      required:
                      - title
                      - url
                      properties:
                        title:
                          type: string
                        url:
                          type: string
                          description: Public page path relative to https://fastgstrefund.com
        '400':
          description: Missing, duplicate or unsupported parameter
        '429':
          description: Rate limit reached; retry after 60 seconds
      tags:
      - Checklist
components:
  securitySchemes:
    account:
      type: oauth2
      description: OAuth 2.1 authorization code with S256 PKCE. Clients register at /oauth/register. The person signs in with an emailed code. See /.well-known/oauth-authorization-server.
      flows:
        authorizationCode:
          authorizationUrl: https://fastgstrefund.com/oauth/authorize
          tokenUrl: https://fastgstrefund.com/oauth/token
          refreshUrl: https://fastgstrefund.com/oauth/token
          scopes:
            refund:generate: Check records, and create and download files for claims the account has paid for.